Soft-db Opus Suite SLM 4-Ch Module Instrukcja Użytkownika Pobierz pdf (Strona 28)

7.2.3 FFT Spectrum Graph

Available data

Data Type

Measure Type Display Type

Freq Weighting

FFT Spectrum level

Leq

Running Average

A, C or Z

SEL

7.2.3.1 Particularities

Legend Values

Selecting versus on a FFT Spectrum graph displays either the Global value or the

Band value (associated to the cursor) on the Legend (see section 5.5.3.1, p. 13).

FFT High Pass Filter

A high pass filter is applied on the FFT spectrum to match the 1/3 Octave Spectrum frequency span,

which is 6.3 Hz to 20 kHz if 1 or 2 inputs are enabled an 20 Hz to 20 kHz if 3 or 4 inputs are enabled

(see section 6.6, p.20).

Averaging Period

The FFT spectrum being a Leq FFT, its averaging time is the same as the Leq Averaging Time (see

section 5.3, p. 9).

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Soft-db Opus Suite SLM 4-Ch Module Instrukcja Użytkownika Strona 28